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Discussion Starter #1
I am interested to know if there is a way to increase the power of a naturally aspirated GQ 4.2 diesel engine through the ECU. Can it be reprogrammed or upgraded? My GQ has a 2 1/2 aluminized exhaust with extractors and the engine breathes well via a snorkel.
Apart from a decent turbo install costing at least $5K what else is there?
 

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Nissan MK,GQ & now GU.
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I am interested to know if there is a way to increase the power of a naturally aspirated GQ 4.2 diesel engine through the ECU. Can it be reprogrammed or upgraded? My GQ has a 2 1/2 aluminized exhaust with extractors and the engine breathes well via a snorkel.
Apart from a decent turbo install costing at least $5K what else is there?
There is no ECU. Plenty of turbo kits around. After fitting one of these kits and a three inch exhaust throw your extractors and exhaust in the scrap metal bin.
 

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Discussion Starter #3
I didn't think it had an ECU but I saw other members talking about theirs in GQ's so was questioning it.
Thanks
 

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GQ Dual Cab. TD42Ti with fruit.
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I didn't think it had an ECU but I saw other members talking about theirs in GQ's so was questioning it.
Thanks
Some of us will be discussing a TCU in a TD42 GQ, but that is for an auto gearbox. The 4.2 petrol EFI GQ will have an ECU.

Funds are best put aside for a turbo, rather than spent elsewhere.
 

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I have had excellent results playing with advancing the injection timing and increasing the fuel just until black out the back. The long and most prudent way is to measure your injection timing so you know where it was as compared to factory and go from there. This can be a pain. The other way is to advance until increased diesel knock then back off. Warning, you can burn pistons up doing this. Best just take it to a tuner with a dyno.
 

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Caboolture Exhaust specializes in tuning Patrols and has a dyno.
Ask for Lyndsay.


Sent from my iPhone using Tapatalk Pro
 

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I'm pretty sure you can get a turbo for way under 5 grand even if it's from someone selling they're old factory turbo off a 4.2 but it helps if you or friends can fit it and there's nothing wrong with using your current exhaust to keep the cost down you don't have to go larger it will run fine.
If your running larger tyres that will make a difference to your current set up. Replacing the air filter with a K&N or simiar will make a small improvement.
 
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